Home / 21,054,217.80-31,581,326.70-19,778,759.40

Finding the Fourth Proportional to 21,054,217.80, 31,581,326.70 and 19,778,759.40

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Solution

The fourth proportional to 21,054,217.80, 31,581,326.70 and 19,778,759.40 is: 29,668,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054,217.80 : 31,581,326.70 = 19,778,759.40 : x
  2. Step 2: Convert to fraction form
    21,054,217.80/31,581,326.70 = 19,778,759.40/x
  3. Step 3: Cross multiply
    21,054,217.80x = 31,581,326.70 × 19,778,759.40
  4. Step 4: Simplify right side
    21,054,217.80x = 624,639,462,332,095.88
  5. Step 5: Solve for x
    x = 624,639,462,332,095.88/21,054,217.80
  6. Step 6: Final answer
    x = 29,668,139.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.